Magazine-gum



I. E. GADBOIS.

MAGAZINE GUN.

APPLICATION FILED DEC.8, I9I5. 1,193,889. PatentedAug. 8,1916.

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J. E. GADBOIS.

MAGAZINE GUN.

APPLICATION FILED Dias, IsI5.

1 1 93,889. Patented Aug. 8, 1916.

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J. E. GADBOS.

MAGAZINE GUN.

APPLICATION FILED Dems. IsIs.

l ,l 93,889.v Patented Aug. 8, 1916.

4 SHEETS-SHEET 3.

ATTCIEN'EY.

J. E. GADBOIS.

MAGAZINE GUN.

APPucATloN msn nEc.a.1915.

1,193,889. t Patented Aug. 8,1916.

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JOSEPH E. GADBOIS, OF SPRINGFIELD, MASSACHUSETTS.

MAGAZINE-GUN.

Specification of Letters Patent.

Patented Aug. s, 191e.

Application led Decembei` 8, 1915. Serial No. 65,841.

T0 all whom t may concern: v v

Be it known that I, JOSEPH E. GADBoIs, a citizen of the United States,residing at Springfield, in the county of Hampden and State oflviassachusetts, have invented a new and useful Improvement in Magazine-Guns, of which the following is a specification.

This invention has particular reference to thattype in which thecartridges are automatically fed, the only manual operation being thatof pulling the trigger.

The primary aim is to provide such a gun which will operate eificientlythroughout and be capable of carrying a large supply of ammunition.

The invention further resides in the construction and combination ofparts hereinafter described and claimed the preferred embodimentbeingillustrated in the drawings, wherein,

Figure 1 is a vertical longitudinal section of a gun stock or buttshowing the invention, in part, therein. Fig. 2 is a hori zontal sectiontaken longitudinally of the stock. Fig. 3 is a partial side elevationo-f the mechanism for pushing the cartridges from the carriers to themagazine chamber. Fig. 4 is a rear elevation thereof. Fig. 5 shows intop plan, partly broken away, the cartridge pushing mechanism inposition for advancing the cartridge carriers. Fig. 6 is a similar viewwith the mechanism pushing the cartridges from the carriers. Figs. 7, 8,9, 10, 11 and 12 are detailed elevations of the mechanism parts. Fig. 13is a horizontal section through the iring drum, the cartridge feedingand ejecting mechanism therefor and the drum rotating means. Fig. 14 isa side elevation of the drum rotating means. Fig. 15 shows the drum inrear elevation. Fig. 16 depicts the same in partial side elevation.

tating means. Fig. 18 shows the drum locking means inoperative. similarsection with `the means operative. Fig. 20 is a'longitudinal sectionthrough the cartridge magazine. Fig. 21 is a transverse section throughthe cartridgelcarriers illustrating the manner of supporting the same.Fig. 22 shows three of the carriers in end elevation with a fragment oftheir endless support. Fig. 23 is a perspective of one of the carriers.Fig. 24 shows the hammer Iwith its tripping star wheel, ,and Figs.

Fig. 17 is i. a view of the opposite side of the drum roy bers may beprovided. Fig. 19 is a and 26 illustrate in section the mounting of thestar wheel on the trigger, the latter being in fragment.

The numeral 1 designates the barrel and 2 the hollow stock of the gun, aring drum 3 being rotatably journaled in the stock to present itscartridge chambers 4 at the rear end of the barrel and in coincidencewith the bore thereof. The hammer 5 for firing the cartridges, as,presented in alinement with the barrel, is pivoted at 6 in the stockand held slightly spaced from the drum, to permit of rotation of thelatter, by the leaf spring 7 which actuates and returns the hammer tonormal position.

The hammer is tripped by a star wheel 8 journaled ,on the pivot 9 of thetrigger 10, the latter carrying a yieldable dog 11 to engage with aratchet 12 iixed tothe star wheel whereby on pulling the trigger, thewheel will partly rotate to trip the hammer,

Aand on releasing the trigger, to return under the action of its spring13, the dog 11 will ride over the ratchet without aifecting the hammer.

The firing drum is provided with a tubular shaft extension l14 carryinga fixed ratchet 15 with which a pawl 16 engages for retaining the drumfrom reverse movement. Proper rotation is effected. by a dog 17yieldably mounted on an oscillatory disk 1S which has a -slotted radialarm 19. The

. trigger is provided with an arm 20 engaging in the slot of arm 19 andadapted, when the trigger is pulled, toswing said slotted arm and thedog 17, the latter, being engaged with the ratchet 15, moving the sametherewith and consequently turning the drum.

In the present instance, the firing drum is only provided with fourcartridge chambers so that each movement of the drum will be a quarterturn, it being obvious that a greater or lesser number of such cham- Thedog 17 rides reversely over the ratchet 15, and, while the latter isheld from L,backward movement by thepawl 16, the cooperating varms 19and 20 retain the drum from forward movement until the trigger ispulled.

The cartridge magazine 21 1 s provided with a lower chamber 22 intowhich the cartridges drop singly and which is alined with the nextsucceeding cartridge chamber 4. A

"charging plunger 23 slides in the rlower chamber 22 for loading thedrum chamber. The plunger is of suiiicient length to close the openingin the magazine leading to the lower chamber to support the nextcartridge from falling until the plunger has returned to inoperativeposition. The cartridges in the magazine are advanced simultaneouslywith the loading` of a drum chamber by a follower 24 which is connectedto the plunger by a stem 25 having a rack part 26. A pinion 27 isinterposed in intermeshing relation between the rack 26 and an opposing,slidable rack 28 which is connected to the trigger by a link 29.

It will thus be noted that as the trigger is pulled the plunger isretracted to allow another cartridge to drop into the lower chamber 22,and when released, the plunger is advanced to load the drum chamber.

An ejector 30 is slidable in the central bore 31 of the firing drum andhas its forward terminal bent backwardly and headed, as at 32, to enterthe forward ends of the cartridge chambers 4 and eject the used shell(see Fig. 13). The ejector is normally maintained free of the drum or ina forward position, by a spring 33 and has its rear end formed -into ahook 34 with which a spring catch 35, carried by the slidable rack 28,is adapted to engage when the trigger is pulled so that` the ejectorwill be moved rearwardly into a drum chamber for cleaning the latterwhen the trigger is released. Thus, after a cartridge chamber has beenloaded, the next two movements of the drum will present the said chamberat firing and ej ecting positions, respectively.

During the liring of the cartridge, the drum is locked by a slidablymounted bolt 36 engaging in the respective keeper recess 37, of a seriesprovided in the firing drum. The bolt is spring projected and isnormally withdrawn from engagement with the drum by having its angularrear end 36 coperative with a cam 38 on the disk 18 to permit ofrotation of said drum,

The magazine is supplied-with cartridges by an endless series ofcarriers 39 supported on a chain 40 which takes over longitudinallyspaced sprockets 41 and 42 journaled in the gun stock. The forwardsprocket 41 is fixed on a transverse shaft 43 having a longitudinalgroove 44 in which a key 45 of wheel 46 slidably engages. This wheel hasradial, hook-shaped arms 47 with which the downturned end of arm 48 isadapted to engage, said arm 48 extending laterally from the stem 25.Obviously, forward movement of the plunger 23 will effect partialrotation of the sprocket 41, when the wheel 46 is in the path of the arm48, and advance the carriers 39.

Each carrier is of box form having side walls and an interposed end wallprovided with an opening 49 therein through which a pusher 50 is adaptedto move for forcing the cartridges from the opposite end of the carrierinto theJ magazine. The pusher is arranged directly opposite the inletopening of the magazine, the carriers moving therebetween. Each rotarymovement of the wheel 46 presents a loaded carrier between the pusherand the magazine opening.

The pusher' is of angular' formation having a horizontal base 50 adaptedto move beneath the carriers, said base having a downturned followerextension 51 projecting through a. guide slot formed in the track orbridge 52. The follower 51 operates in the cam slot 53 of a revolublebarrel 54, said cam slot comprising a spiral section and a straight orlongitudinal section joining the ends of the spiral. the barrel 54 andis held against backward movement by a pawl 56 while forward motion isimparted by the rod 57 connected to the trigger and engaging theratchet. As the barrel 54 is revolved, by pulling the trigger, thefollower and pusher' are advanced so that a cartridge is fed to themagazine every time one is fired.

While the pusher is in a carrier, it is essential that the latter be notadvanced and to this end, the wheel 46 is peripherally grooved at 58 toreceive a yoke 59 which extends forwardly from the follower 51 wherebythe wheel is shifted from the path of arm 48 when the pusher begins itstransverse movement. Rotation of the barrel 54 causes the follower totravel in the spiral section and, when the last cartridge of the carrieris moved into the magazine, the follower enters the straight groovesection and is pulled back or retracted to normal position, in which thepusher is free of the carrier, by coiled spring 60. This action bringsthe wheel 46 into the path of arm 48 for advancing a fresh carrier.

Brieiy the operation is as follows: The initial pull on the trigger willrotate the firing drum to bring a cartridge chamber from the magazine tothe hammer and there be locked by bolt 36. Continued pulling on thetriggeractuates the hammer, advances catch 35 into engagement with theejector, retracts the plunger 23 to permit of another cartridge droppinginto the lower chamber, slides the follower 24 in the magazinebackwardly to allow a cartridge from the carriers being inserted, andrevolving the barrel 54 to actuate the pusher. Then the trigger isreleased, the bolt 36 is disengaged from the drum, the ejector actuated,and the plunger 23 and followerl 24 moved to advance the cartridges intheir paths. A lug 61 disposed in the path of the catch 35 engages thelatter when actuating the ejector and provides a cam action to disengagethe catch. If the last cartridge has been removed from a carrier, thearm 48 engages A ratchet 55 is fixed to` A said wheel 46, when thetrigger is released, for advancing the carriers.

Having thus described my invention, what I lclaim as new and desire tosecure by Letters Patent is l. In a magazine gun, an endless series ofcartridge carriers, a magazine, means for moving cartridges from thecarriers to the magazine, a firing drum, means for feeding thecartridges to the latter from the magazine, a hammer for firing thecartridges in the drum, an ejector, and a trigger controlling theaforesaid means, hammer and ejector.

2. In a magazine gun, a firing drum, a magazine having a lower chamberfrom which cartridges are loaded into the drum, chamber communicatingwith the magazine, a plunger in said chamber for moving the cartridgesinto the firing drum and closing communication between the.

chamber and magazine, a follower in the latter connected for movementwith the plunger, and a firing mechanism operative to actuate theplunger.

3. In a magazine gun, a rotatable firing drum having cartridge chambersand an axial opening, an ejector slidable in the drum opening andadapted for entering the chambers, a hammer, a trigger, and a re*leasable connection between the trigger and ejector.

4l. In a magazine gun, a rotary firing drum, means for feedingcartridges thereto, a hammer, means for rotating the drum, and a triggerfor operating the hammer and the aforesaid means.

5. In a magazine gun, a hollow stock, spaced sprockets therein, a chaintaking over the sprockets, a series of carriers on the chain, a magazinehaving a receiving opening opposite which the carriers are adapted tomove, means for intermittently driving the sprockets, and a firingmechanism into which the magazine leads.

6. In a magazine gun, a hollow stock, a series of carriers, a magazinehaving a receiv-v ing opening into which the cartridges are fed from thecarriers, a. ring mechanism to which the magazine leads, and means formoving the carriers intermittently to present them individually at thereceiving opening of the magazine.

7. In a magazine gun, a cartridge feeding mechanism including a seriesof carriers, a pusher normally free of the carriers and movabletransversely thereof to feed the cartridges therefrom, means for movingthe pusher intermittently, and means under control of the pusher formoving the carriers.

8. In a magazine gun, a cartridge chamber, an ejector therefor, a firingmechanism including a trigger, and means operable by the trigger toreleasably engage the ejector to actuate the latter.

9. In a magazine gun, a rotatable drum, means for rotating the same, amagazine, plunger means therein, a series of carriers, means for movingthe carriers, a pusher for moving the cartridges from the carriers tothe magazine, means for operating the pusher, a hammer, anda trigger foractuating the hammer and aforesaid means.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH E. GADBOIS.

Vitnesses:

STANISLAR FOURNIER, ADA E. HAGERTY.

Copies of this patent may be obtained for ve cents each, by addressing`the Commissioner of Patents, Washington, D. C.

